/*
 *  Copyright 2011 yura.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *  under the License.
 */

package org.opu.vcforms.view.component;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

/**
 *
 * @author yura
 */
public class ChangeListenerImpl implements PropertyChangeListener {

    final String name;
    private GUIProperties prop;

    public ChangeListenerImpl(String name, GUIProperties prop) {
        this.name = name;
        this.prop = prop;
    }

    @Override
    public void propertyChange(PropertyChangeEvent evt) {
        String oldVal = String.valueOf(evt.getOldValue());
        String newVal = String.valueOf(evt.getNewValue());

        //if new value really new
        if (!newVal.equals(oldVal)) {
            if (!prop.isChanged()) {
                prop.setChanged(true);
            }
            prop.getChanges().setProperty(name + "." + evt.getPropertyName(), newVal);
        }
    }
}
